Paper-box-foriiihg machine



G. H. BARTLETT.

PAPER BOX FORMING MACHINE.

APPLICATION FILED FEB- 14, 1918.

1,305,51 1 PatentedJune 3, 1919.

3 SHEETSSHEET INVENTOR. I

ATTORNEYS G. H. BARTLETT.

PAPER BOX FORMING MACHINE.

APPLICATION FILED FEB. 14, me.

1,305,5 1 1 Patented June 3, 1919.

a SHEETS-SHEET 2.

eorge MWZZ??? (52/ ATTORNEYS G. H. BARTLETT.

PAPER BOX FORMING MACHINE.

APPLICATION FILED FEB. 14, 1918.

1,305,51 1 Patented June 3,1919.

3 SHEETS-SHEET 3- m 3 Q} INVENTOR. B flea/ye EZWZZeZz A TTORNEYS pnrrnn snares GEORGE H. BARTLETT, OF SAN FRANCISCO, CALIFORNIA, ASSIGNUR TO NATIONAL EAPER PRODUCTS 60., 0F Sm FRANCISCO, CALIFURNIA, A UORPORATION OF CALIFORNIA.

EAPER-BOX-FGRMING MACHINE.

Specification of Letters Patent.

Patented June 3, 1%19.

Application filed. February 14:, 1918. Serial No. 217,084.

ing Machines, of which the following is a specification.

This invention relates to paper box machinery and particularly pertains to a machine for forming paper boxes of irregular shapes.

The principal object of this invention is to provide a machine adapted to act in conjunction and continuously with a paper tube machine to shape the freshly wrapped tube to produce box walls of various configuration, it being common to roll the tube cylindrical.

In carrying out the present invention it is intended to provide a forming machinehaving a central mandrel or core in longitudinal alinement with the cylindrical mandrel of a tube forming machine and adapted to receive the tube as it passes off from the end of the cylindrical mandrel. The core is especially formed so that the tube may be shaped upon it to assume elliptical or polygonal shaped boxes, the heights of which are determined, by cuttingv mechanism operating as the formation of the boxes progresses.

The invention is illustrated by way of example in the accompanying drawings, in which- Figure 1 is an enlarged view in side elevation illustrating the vital. elements of the forming machine in their cooperative: relation to each other.

Fig. 2 is an enlarged fragmentary View in section illustrating the end of the forming mandrel and indicating the circulation of a heating fluid t-herethrough.

Fig. 3 is a view in plan illustrating the principal parts of the forming machine.

Fig. a is a view in transverse section as seen on the line of Fig. 3 disclosing the relation of the forming core to the ironing rollers and further indicating the manner in which they are simultaneously driven.

Fig. 5 1s a view in transverse section as viewed on the line 5-5 of Fig. 3 disclosing the adjustment provided the supports of theing the gear relation existing between the tube wrapping machine and the forming machine with which the present invention is concerned.

Fig. 7 is an enlarged View in plan illustrating by section and elevation the tube wrapping machine which produces the tube subsequently treated by the forming machine.

Figs. 8 and 9 are views in elevation illustrating the outer appearance of the cylindrical tube as it comes from the wrapping machine.

Figs. 10 and 11 are views in elevation illustrating the outer appearance of the tube after having been formed square upon the forming machine.

Figs. 12 and 13 are sectional views disclosing other forms which the paper tubing might be made to assume.

Referring more particularly to the drawings, 10 indicates a base to which parallel longitudinally extending angle plates 11 and 12 are fastened by bolts 13. The formation of these plates is particularly disclosed in Figs. 4 and 5 where it will be seen that their vertical legs are parallel and spaced from each other and their horizontal legs are outturned in opposite direct-ions and lie in the same horizontal plane. Adjusting bolts 14 extend through the vertical portions of these angle plates and are distributed at intervals therealong. These bolts are fitted with lock nuts 15, one of which is disposed upon each side of each plate and provides lateral adjustment of the plates in relation to each othergwhen the screws 13 are loosened. Adjustably fastened to the outwardly eXtending leg portions of these plates are vertical adjusting bolts 16 and 17 which are provided with complementary lock nuts 18 at their opposite ends. The upper ends of these bolts extend through horizontal leg portions of upper angles 19 and 20 which are'held by the bolts in horizontal parallel relation to the adjacent leg portions of the lower angles. The vertical legs of the upper angle plates are parallel and are in vertical alinement with similar legs or" the lower plates,-

being held in spaced relation to each other by means of adjusting bolts 21 having complementary lock nuts 22 serving the same purpose as the bolts 14, i6 and 17.

Referring particularly to Fig. 5, it will be seen that the angle plates when assembled as described will assume a Maltese cross shape and will provide a longitudinal central opening through which a holloW-formtary sets of ironing rollers, sets 24 and 25 being disposed between the vertical legs of the angle plates and upon -the upper and lower sides of the mandrel while sets 26 and 27 are disposed between the horizontal legs of the angle plates and upon the opposite vertical sides of the mandrel. These sets are here shown as comprising three rollers, although it will be understood that the number will be made to agreewith the use to which the machine is put.

Each of the rollers is mounted upon an individual shaft extending through hearings carried by the various legs of the angle plates and are simultaneously driven by a driving mechanism. This mechanism comprises a main drive shaft 28 extending in longitudanal alinement with the machine and rotatably held within hearings secured to one of the angle plates thereof. A. pulley 29 is fastened to one end of the shaft to receive motive power while gears 30 are disposed at intervals along the shaft and simultaneously mesh with gears 31.npon vertically disposed jack shafts 32. In the present instance, these secondary shafts 82 form the main shafts upon which the ironing rollers 26 are mounted. Driving gears 33 and-34 are secured to the jack shafts upon opposite sides of the ironing rollers and mesh with gears 35 and :36 respectively. These last-named gears are fixed to the horizontal shafts which carry the ironing rollers 24 and 25., Gears 3'? are fastened at the opposite ends of the shafts of rollers 24 and are in mesh with complementary gears 38 driving the shafts of rollers 27. It will thus b seen that rotation of the main shaft 28 will cause simultaneous uniform rotation of allot the spindles which carry the various ironing rollers disposed upon the opposite sides of the mandrel.

- Referring particularly to Fig: 1, it will he seen that the mandrel here shown is square 1n sectional configuration throughout the;

major portion of its length and that the square merges into a cylindrical portion at one end of the mandrel. It will further be noted that the mandrel is hollow and is provided with a centrally disposed inflow pipe 1 39 which will conduct steam into the mandrel and which is telescoped within an exhaust pipe 40 adapted to complete the circulation of the heating fluid. By this means the core or mandrel 23 may be heated to a desired temperature and will thus facilitate in forming the box blanks without cracking the stock from which they are made. Conduits 39 and 40 are concentric with the common longibelts 45 are wrapped around the mandrel and the partly formed tube to form power transmitting means for feeding the paper to the mandrel, wrapping it thcrearound and so advancing it therealong so that the formed tube will be continuously forced 011' of one end of-the mandrel and on to the adjacent cylindrical end or the forming core 23.

A rotating cutter 45 is mounted for slidahle movement in a position to sever the wrapped blank into desired lengths as it is carried from the wrapping machine to the forming machine.

In operation paper blanks 43 and 44 are carried on to the cylindrical mandrel 41 and wrapped therearound, it being understood that their, inner faces are treated with glue prior to the wrapping operation. As the belts 45 are driven the paper is tightly drawn around the mandrel and assumes an outer and an inner wall glued together, the seams of which occur midway the length of the .two strips of paper and are thus covered and form. a continuous two-ply wall. It will he undeistood that walls of other thick ness may he formed with this machine and that the present invention is in no way limited to theconstruction or operation of a tube wrapping machine.

As the tube is formed it is projected 0d of the end of the cylindrical mandrel 41 and on to the adjacent end oi the mandrel 23. The cutting member &5, which is disposed between the adjacent ends of these mandrels, may he sw nng into engagement with the tube and will sever it into desired lengths corresponding to the heights of the boxes to be formed. These lengths of cylindrical tub-' ing are then carried over the cylindrical end of the core 23 and will he led on to the square portion of the core by the various ironing rollers 24 to 2?, inclusive, it being understood that the core is supported in its substantially centered position by means of a supporting roller 48 rotataloly mounted beneath the core and upon a hearing 4'? adj ustablr secured the lose 10. As the ironing rol' ersi force the tube sections along the square core 23 the tube will be stretched and shaped to the sectional contour of the core and when it passes from the opposite end thereof will be permanently formed into the shape desired. it will thus be seen that as the tube has been freshly made and the glue naoaeu binding it has not yet set the heat of the core 23 and the pressing action of the ironing rollers will cause the various thicknesses of the tube wall to be properly stretched and shaped in relation to each other as they ad here thereto. By a change in design in the sectional formation of the core 23 and the arrangement of the ironing rollers boxes of various shapes may be made in a continuous operation and in conjunction with a tube wrapping machine.

It will thus be seen that the device here disclosed is simple and direct in its operation, is not liable to become inoperative and may be. readily adapted for forming box blanks of various shapes.

While I have shown the preferred construction of my invention as now known to me, it will be understood that various changes in the combination, construction and arrangement of parts may be made by those skilled in the art without departing from the spirit of the invention as claimed.

Having thus described my invention, what I claim and desire secure by Letters Patent is:

1. A paper box forming machine comprising yieldable supporting means for receiving a tubular box blank from a paper tube wrapping machine and forming means adapted to shape the blmk to the outer con.- figuration. of the support.

2. A paper box forming machine compri ing a floating core over which a tubular box blank is drawn as the same leaves a paper tube wrapping machine and ironing rollers adapted to shape the blank to the outer configuration of the core and to. advance it therealong.

3. A paper box forming machine compris ing a floatm core arranged to receive a tubular boxb ank from a paper tube wrapping machine, a rotary forming means mounted in relatively fixed bearings and adapted. to shape the blank to the outer configuration of the core, the latter being automatically adjusted through its floating action to accommodate box blanks having walls for the varying thickness 4. In combination with a paper tube wrapping machine having a hollow mandrel and a paper box forming machine having a hollow core arranged to receive a tubular box blank from the mandrel of the paper tube wrapping machine, formed of means adapted to shape the blank to the outer configuration of a. core, and heating means common to the core and the mandrel.

5. In combination with a paper tube wrapping machine having a hollow mandrel and a paper box forming machine having a. floating hollow core arranged to receive a tubular box blank from the mandrel of the paper tube wrapping machine, formed of outer configuration. of a core, and heating means common to the core and the mandrel and arranged to permit the floating action of the said core.

7 In combination with a paper tube wrapping machine having a hollow mandrel and a paper box forming machine having a floating hollow core arranged to receive a tubular box blank from the mandrel of the paper tube wrapping machine, formed of means adapted to shape the blank to the outer configuration of a core, and heating means common to the spindle and the core and arranged within and connecting with the said mandrel and core without interfering withthe floating action of the latter.

8. In a paper box forming machine, a tubular floating core, means for heating said core without afiecting the floating action of the same, a series of ironing rollers arranged around the core and adjacent thereto whereby a box blank slipping over the core will be caused to conform thereto by the pressure of the rollers.

9. ln-apaper box forming machine, a tubular floating core arranged to receive a. tubular box blank from a'paper tube wrapping machine, means forheating said core without afiecting the floating action of the same, a series of ironing rollers arranged around the core and. adjacent thereto whereby a box blank slipping over the core will be caused to conform thereto by the pressure of the rollers, and means for simultaneously driving the rollers to advance the blank along the core,

10. In combination with a Paper tube 'wrappingmachine, a paper box forming machine, including a fioatin core arranged to receive a tubular box blan from the said paper tube wrapping machine and forming rollers-mounted in relatively fixed bearings and cooperating with the core to shape the blank to the outer configuration of the latter.

11. In combination with a paper tube wrapping machine a floating shaping core in longitudinal alinemen-t therewith and over which the tube is carried as made by the wrap-ping machine and ironing rollers mounted in relativelyfixed bearings adapted to' press the side walls of the tube against said core to cause the tube to assume the for mation of the outer surface of the core.

12. A box forming machine comprising a Mill let

new; 1'1

base, a series of sepemee frame members CH1- ried thereupon, means for adjusting saicl fi'aine members in relation to each other and the base, a series 0;? ironing rollers carried by the various tfzenie men'ibers, driving means therefor and a. core extending longitudinally "che 'Ermne members and surround? by the various rellers whereby a paper box blank may be pressed by the reliefs against the outer surface of the core to assume the 10 shape thereof.

in testimony whereof I have hereunto setzny hand in the presence oftwo subscribing Witnesses.

GEORGE H. BARTLJJTT. V fitnesses C. S. RUTHERFORD? W. Kins. 

